Frame construction.



E.G.BUDD. IRAME GONSTRUGTION. APPLIOAJ.ION FILED DBO. 21, 1907.

Pmtented Apr. 20, 1909.

INVENTOR v ATTORNEY WITNESSES:

UNITE STATES ATENT-1 oFFrcE.

EDWARD e. BUDD, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HALE-KILBURN ME TAL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GONSTRUGTION.

Specification of Letters Patent.

Pat-ems April 20, 1909.

\ Application filed December 21, 1 907. Seria1No.407,5 5. t

To all whom it may concern:

Be it known that I, EDWARD G. BUDD, a citizen of the United States, residingin the city and county of Philadelphia, State of .3 Pennsylvania, have invented a. certain new and useful Improvement in Frame Construction, of which the following isa s 'ecification.

This invention is directed to t e improvement of the construction of frames consisting of two or more hollow metallic frame-members secured together at their ends, and has reference, more particularly, to the method of making the joints between the ends of the members.

The inventionis of particular utility in the construction of frames for metallic doors and in window frames and sashes consisting of frame-members of sheet-metal pressed to theform of hollow rails, the ends. of these rails being secured together.

The object of the invention is to provide an improved and economic method of securing together the ends of the frame-members making a uniform joint possessing great strength and producing a frame which is of attractive appearance.

In accordance with the invention, the ends of the frame-members are weldedtogether so that they form 'a unitary structure, as in this way great strength is secured. A corner-box is employed underlying the joint between the frame-members and extendin a short distance within the .ends thereof. This box is preferably of such size that it fits may be. made of wood but as the we ding flame is apt to burn the wood of. the corner piece, 1' associate with, the latter a heatresisting material arranged directly under maybe employed for this purpose-and this may be inlaid in the wooden corner-piece in position to underlie the-line ofthejoint.

The preferred embodiment of my invenis secured. The ends of the rails arG,pI'6i 81'- Within the ends of the l'rame memhers and. The use of a the line of the. weld. A strip of asbestos tion is illustrated in the accompanying drawin sin whichigure 1 is'an elevation of the lower portion of a metallic door, Fig. 2 is an enlarged view of one cornerthereof, broken away and sectioned in art,'and Fig. 3 is a section on line3 3 of Fig. 1.

Referring to these drawings, the door shown consists of a frame formed of rails 1, 22nd 3 secured together at their ends and a panel 4 secured to these rails. Each of the rails is hollow, of rectangular cross-section and formed of pressed sheet-metah ireferabl a single strip-of sheet-metal is employed in making one of the rails, this being ressed to rectangular form to bring the ateral edges together and form a flange on the innerside of the rail to-which the ninel 4, consisting of one or more sheet-metal plates,

ably mitered, as shown in the drawings, though this is in no way essential. At each of thecorners of the frame is a corneriece 5 underlying the junction of the en s of the rails and extending a short distance within the ends thereof This piece is accurately cut to the interior dimansions of the rails so that it completely fills the openings in the rails at" the ends thereof. Corner-piece 5 is made of wood or a similar material which will absorb and conduct heat but slowly. In this cornerpiece, grooves 6 are. out in such positions that they will directly underlie the joint between the two frame-members. Strips .of heat-resisting material 7, such as -2tshestos, are laid in these grooves, these strips being of such size that they-comiletely lill the grooves and present surfaces ush with those of the corher-piece f x With the partsthus constructed, the ends of two rails are broughttogether with a corher-piece lying within them, and the welding flame is applied to the edge-s to be joined. As wood and asbestos absorb and radiate heat very slowly, the extreme ends of the rails will he 'quickly'raised to the welding temperature and the asbestos being directly I under the line of the weld protects the wooden corneriece against. being burned 105 by the flame. order to hold the parts in proper relative'positions, the rails maybe clamped to the corner-piece during the welding operation, there being no danger of crushing the 'asbestos-asit fits-snugly in the {groove in the corner-piece. By joining the ame members in this way, a unitary structure, is produced and one possessing great f strength. The employment of a corner-box which will not absorb heat and conduct it away from the line of the weld "permits of much more rapid operation and by providing the heat resisting strip directly under the weld, a corner-box of wood may be emlo ployed.

Having described 'my invention what I claim as new therein and desire to secure by Letters Patent of the United States is:

. 1. Thecombination of two hollow frame- 1 5 "members of ressed sheet-metal having their ends welde together to form a unitary structure and a corner-piece underlying the joint between said members and-extending Within the ends. thereof, said corner-piece having non-combustible, material therein which will absorb heat but slowly, substanterial which will absorb heat but slowly, andheat-resisting material directly underlying the joint between said members.

4. The combination of two hollow frame- 40 members of ressed sheet-metal having their ends welded together to form a -unitary structure, a corner-piece'extending within the ends ofsaid members'llaving a groove therein, and heat-resistingmaterial in saidiIY-.,

e ends of said membersgroove underlying the joint between said members, substantially as described.

5. The combination of two hollow framemembers of )ressed sheet-metal having their ends welded structure, a corner-piece extending within the ends of said members and completely filling the same, said piece having a groove therein, and heat-resisting material in said groove underlying the joint between said members, substantially as described.

6'. The combination of two hollow framemembers of )ressed sheet-metal having 5 heir ends welded together to form a unitary structure, a corner-piece'of wood extending within the ends of said members and cornpletely filling the same, said piecehaving a groovetherein, and asbestos in said groove underlying the joint between said members, substantially as described.

7. The combination of two hollow framemembers of ressed sheet-metal having their ends welde together to form a unitary structure, a corner iece of wood extending within and filling t e ends of said members, said piece having a groove therein, and heatresisting material in said groove underlying the joint between said members, substan tially as described.

8. The combination of two hollow frame members of ressed sheet-metal having their ends welded together to form a unitary structure, a cornerpiece extending within and filling the ends of said members, said piece having a groove therein, and asbestos in said groove underlying the oints between said members, substantially as described.

This specification signed and witnessed this 17th day of December, 1907.

EDWARD G. BUDLD \Vitnesses M. GE'rz, R. M. FRIES.

together to form a unitary 

